To grab this:

• FTP in to www.ednmag.com. (yes, ftp into the WWW site.)
• login: anonymous
• passwd: your user id
• get EDN/di_sig/DI1223Z.ZIP mpy.ZIP
• use your favorite program to uncompress the ZIP file

Normally, I would have just had an ftp URL which looks like:
ftp://www.ednmag.com/EDN/di_sig/DI1223Z.ZIP
in the bibliography. But, that doesn't seem to work. My current theory is that the browser attempts to grab the file /EDN/di_sig/DI1223Z.ZIP (note the leading slash), which the server will not allow you to do since it denies anonymous ftp'ers access to the root directory (slash). I don't know how to tell the broswer to omit the root slash.